If two balls each of mass 0.06 Kg moving in opposite directions with speed 4 m/sec collides and rebound with the same speed,then coefficient of restitution for the collision will be:-

\frac{1}{4}

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\frac{1}{2}

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Solution

The correct option is C 1
Coefficient of restitution, $e$

$e = - \frac{r e l a t i v e v e l o c i t y o f s e p e r a t i o n}{r e l a t i v e v e l o c i t y o f a p p p r o a c h}$

$e = - \frac{4 (-^i) - 4 (+^i)}{4^i - 4 (-^i)} = 1$

Hence, coefficient of restitution is $1$

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